# Rayyan vs ChatPDF

The clearest difference is rating: ChatPDF at 4.6 against Rayyan's 3.8. ChatPDF also leads on update cadence (every 4 days vs every 5 weeks) and ratings volume (91 vs 23). Rayyan's advantage is review sentiment (37% vs 0%) and ads (none vs shown). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Rayyan sells 13 in-app purchases, starting at $9.99 per month and ChatPDF sells 2 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

ChatPDF holds the better App Store score, 4.6 against 3.8. Both are backed by a comparable volume of ratings — 23 and 91 respectively. Written reviews complicate that: 37% of Rayyan's written reviews are positive against 0% of ChatPDF's, so the app with the better star average is not the one people write more warmly about.

Rayyan ships an update every 5 weeks, ChatPDF every 4 days. The most recent releases landed on September 25, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Rayyan | ChatPDF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (23 ratings)](https://appshunter.io/ios/app/rayyan/id1581620841/reviews) | **[4.6 (91 ratings)](https://appshunter.io/ios/app/chatpdf-chat-pdf-ai/id6742454061/reviews)** |
| Number of ratings | 23 | **91** |
| Positive reviews | **37.1% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 36 MB | 41 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Rayyan Systems, Inc.](https://appshunter.io/developer/1581620843) | [ChatPDF GmbH](https://appshunter.io/developer/1711436087) |

## What reviewers say

### Rayyan

[App page](https://appshunter.io/ios/app/rayyan/id1581620841)

This app streamlines systematic literature reviews for researchers, enabling quick article screening and decision-making on mobile devices. It supports offline work and real-time collaboration, significantly reducing review time.

**Highlights:** Offline article screening, Real-time collaboration, Quick inclusion decisions, Reference labeling, Article filtering, Configurable settings

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Student Monthly | $9.99 | per month |
| Professional Monthly | $14.99 | per month |
| Student Quarterly | $24.99 | per 3 months |
| Essential Quarterly | $24.99 | per 3 months |
| Professional Quarterly | $39.99 | per 3 months |
| Advanced Quarterly | $39.99 | per 3 months |
| Student Annual | $59.99 | per year |
| Essential Annual | $59.99 | per year |
| Advanced Quarterly 2 Seats | $79.99 | per 3 months |
| Professional Annual | $99.99 | per year |
| Advanced Annual | $99.99 | per year |
| Advanced Quarterly 4 Seats | $159.99 | per 3 months |
| Advanced Annual 5 Seats | $499.99 | per year |


### ChatPDF

[App page](https://appshunter.io/ios/app/chatpdf-chat-pdf-ai/id6742454061)

This AI-powered tool allows you to ask questions and get summaries directly from your PDF documents. It supports multiple files, OCR, and multilingual interactions, making complex information easily accessible.

**Highlights:** Instant answers from PDFs, Quick document summaries, Chat with multiple PDFs, OCR for scanned documents, Multilingual support, Cross-device access

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plus Subscription | $14.99 | per month |
| ChatPDF Yearly Plus Plan | $89.99 | per year |


## Frequently asked questions

### Is Rayyan free?

Rayyan is free to download, with in-app purchases available.

### Is ChatPDF free?

ChatPDF is free to download, with in-app purchases available.

### Which has better reviews, Rayyan or ChatPDF?

ChatPDF is rated higher. Rayyan averages 3.8 out of 5 from 23 ratings, while ChatPDF averages 4.6 from 91 ratings.

### Do Rayyan or ChatPDF have ads?

ChatPDF shows ads; Rayyan does not.

### Which is updated more often, Rayyan or ChatPDF?

Rayyan ships an update every 5 weeks, and ChatPDF every 4 days. Most recently, Rayyan was updated on September 25, 2026 and ChatPDF on September 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*